None that I'm aware of. Then again, I'm not sure that I expect to hear back from most big Rally Organizers within just one week: I tend to give it a couple weeks. However, if you're concerned about the 1 July deadline you might try calling instead of Email. Their contact number can be found at the top of the information page:
http://www.dscb.org/etr/etr07/about_etr.pdf